code: def test_has_event_handler():
      engine = DummyEngine()
      handlers = [MagicMock(spec_set=True), MagicMock(spec_set=True)]
      m = MagicMock(spec_set=True)
      for handler in handlers:
          engine.add_event_handler(Events.STARTED, handler)
      engine.add_event_handler(Events.COMPLETED, m)
  
      for handler in handlers:
          assert engine.has_event_handler(handler, Events.STARTED)
          assert engine.has_event_handler(handler)
          assert not engine.has_event_handler(handler, Events.COMPLETED)
          assert not engine.has_event_handler(
              handler, Events.EPOCH_STARTED
          )
  
      assert not engine.has_event_handler(m, Events.STARTED)
      assert engine.has_event_handler(m, Events.COMPLETED)
      assert engine.has_event_handler(m)
      assert not engine.has_event_handler(m, Events.EPOCH_STARTED)
  
imports: import functools
  import gc
  from unittest.mock import call, create_autospec, MagicMock
  import pytest
  from pytest import raises
  from ignite.engine import Engine, Events, State
  from ignite.engine.events import EventsList
label_desc: Use image node_id 9 for calling a global function with example usage: test_has_event_handler() without return types